[Gta04-owner] Power consumption with 3.12
ben_deering at swissmail.org
Thu Nov 7 13:41:53 CET 2013
My gta04 is working pretty well right now, even if there are several
I can listen to the radio, take pictures, use gps, send and receive
Right now the biggest problem is power consumption.
For a while, the phone would use ~600ma at boot (this was the wifi power
problem) until I scanned for wifi access points and turned it off
again. After this I would see idle power ~195ma and suspend ~80ma.
Starting with the first kernel to fix this bug, I saw idle power closer
to 300ma and suspend still around 80ma.
I just tried disabling omap3_isp and am again seeing ~200ma at idle but
I doubt that is related to the wifi change. With omap3_isp disabled I
did see 53-56ma suspend.
https://linuxtv.org/patch/7836/ I don't fully understand this, but it
sounds like they disable some cpuidle features when camera is active,
but maybe our camera driver says it is always active? Maybe I will try
to look at this tonight.
Another change I noticed in newer kernels is that iio drivers don't seem
to allow for powering things off (polling rate can't be set to 0, etc).
I will try making hmc a module and disabling it to see if there is an
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